You can't really go wrong with any of those options. But LionelAmbrose is pretty close to naming perfection if you ask me. Lionel is just such a great, underused classic, and Ambrose pairs up with it great. Feels both friendly and formal, both creative and classic, just hits the best of all sides.
My top 3 of your choices would be all the Lionel options, just because I like Lionel so much, after that it'd be really tough for me to chose. Walter is my least favorite of the bunch, but all the other options are almost equal in my mind (but I do like PhilipHugo better than PhilipAmos).